Head-shaft
Position
Monitoring
System for
gyratory crushers
Sushant Tiwari
Gyratory Crushers
Used for sizing of coal at Coal Handling Plants
Gyratory
Crusher
Internals
WHY HEAD SHAFT POSITION IS FREQUENTLY
CHANGED?
•To control size of the crushed coal.
•To adjust for aberration of the mantle.
To adjust flow rate for slurry and powder coal.
•To remove trapped non-crushable foreign objects.
•To start under full load.
THE PROBLEM
Head shaft is raised or lowered with the help of a
hydraulic system.
There is no indication for position of the head shaft and
the operator monitors the oil level in the hydraulic tank
to estimate position. This method is however error prone.
Head shaft is subjected to extreme pressure if raised or
lowered beyond limits, which may result into premature
failure.
A system to facilitate the operator to know the real-time
position of the head shaft is needed.
PROPOSED
SOLUTION
An ultrasonic sensor that
measures the position.
A small computer which
process the data from
the sensor to human
readable form.
A console displays the
position in graphical
and numerical form
SENSOR
INSTALLATION
INTERFACING
PROGRAMMING AND
CALIBRATION
WORKING STATUS
THANK YOU